MAGNETIC OBSERVATIONS, 
161 
OBSERVATIONS—Continued. 
MAGNETIC DECLINATION AND INDEX ERROR OF NEEDLES. 
Station, Albuquerque; latitude 35° 05' 50"; longitude 7/t. 06m. 31.47s. 
Date. 
Needle. 
No. of obser¬ 
vations. 
Magnetic declina¬ 
tion. 
Index error of 
needle. 
Remarks. 
1853. 
o ' " 
. ,, 
October 17 
C.. 
12 
13 23 14 
October 20 
c. 
12 
13 25 56 
Poles reversed. 
October IS 
A.... 
6 
13 13 21 
-f 11 14 
Ociober 19 
A... 
6 
13 24 31 
4- 4 
October 21 
B .. 
6 
13 22 41 
+ 1 54 
Station, Cambridge Observatory ; latitude 42° 22' 48"; longitude 4h. 44m. 29.6s. 
1850. 
o ' " 
* // 
August 9 
C.. 
6 
9 30 15 
A ugust 9 
A..... 
6 
9 41 25 
— 11 10 
August 9 
B..... 
6 
9 30 45 
— 30 
MAGNETIC INCLINATION AND INDEX ERROR OF NEEDLES. 
Station, Cambridge Observatory; latitude 42° 22' 48"; longitude 4h. 44 m. 29.6. 
Date. 
Needle. 
Hour. 
Ther. 
Fah. 
No. of ob¬ 
servations. 
Inclination. 
Index error 
of needle. 
Remarks. 
1850. 
o 
o 
- 
- 
/- 
9 
C... 
11 
a. m_ 
75 
12 
74 
33 
50 
Poles reversed_ 
August 
9 
A. 
4 
p. m_ 
75 
6 
74 
23 
00 
+ 10 
50 
August 
9 
A. 
1 
p. m_ 
75 
6 
74 
18 
48 
+ 15 
02 
August 
9 
A. 
4 
30 p. m... 
75 
6 
74 
19 
20 
+ 14 
30 
August 
9 
B.-. 
6 
p. m. 
75 
6 
74 
22 
00 
+ 11 
50 
August 
9 
B__ 
6 
30 p. m... 
75 
6 
74 
25 
50 
+ 8 
00 
Station, Albuquerque; latitude 35° 05' 50"; longitude 111. 06m. 31.47s. 
1853. 
o 
O 
r 
/ 
» 
17 
C .. 
2 
p. Ill_ 
76 
12 
62 
30 
50 
Poles reversed. 
20 
C.-. 
5 
p. HI_ 
74 
12 
62 
25 
35 
Poles reversed. 
18 
A. 
1 
p. m_ 
6 
62 
11 
40 
-f 16 
32 
18 
A. 
9 
p. m _ 
75 
6 
62 
14 
30 
4- 13 
42 
October 
19 
A.. 
li 
a. m_ 
73 
6 
62 
08 
25 
4- 19 
47 
21 
B.... 
12 
in_ 
73 
6 
62 
20 
20 
4- 7 
52 
October 
21 
B.. 
1 
30 p. in.-. 
73 
6 
62 
18 
10 
+ 10 
02 
Station, Zuhi; latitude 35° 07' 04''.49 ; longitude Ih. 13m. 16.44s. 
Date. 
Needle. 
Hour. 
Ther. 
Fall. 
No. of ob¬ 
servation. 
Inclination. 
Index error 
of needle. 
Remarks. 
1853. 
November 22 
November 21 
c... . 
1 p. m_ 
0 
76 
74 
12 
6 
O ' " 
62 01 47 
61 55 30 
' " 
Poles reversed. 
B. 
3 p. m_ 
+ 6 17 
21 Ttl 
